What is the correct tip type to use for shrinking metal with an oxyacetylene torch?

The appropriate tip type for shrinking metal with an oxyacetylene torch is crucial for effectively controlling the heat and achieving the desired results. Options #1 and #2 tips are smaller in size, allowing for a more concentrated flame which is necessary for precision work such as shrinking metal. This concentration helps in delivering focused heat to a small area, ensuring that the metal is heated quickly and evenly without affecting the surrounding area excessively.

Smaller tips produce a more defined and controlled flame, which is ideal for tasks that require careful manipulation of the metal, such as shrinking. This technique relies on the ability to apply heat to a localized section of the metal to induce contraction, thus pulling the material together to eliminate dents or other deformities. Using a tip that is too large would result in too much heat being applied to a broader area, potentially leading to unwanted warping or damage to the metal.

Understanding the application of different tip sizes in relation to the task is essential for anyone working with oxyacetylene torches. Using the right tip fosters better control and improves the effectiveness of the repair process.